Timer brush



July 3, 1928.

` C. DAY

TIMER BRUSH Filed sept. 28, 1927 Patented July 3, 1928.

UNITED ySTATES CHARLES DAY, OF FORT SMITH, ARKANSAS.

TIMER BRUSH.

Application filed September 28, 1927.

This invention is a timer brush for use upon conventional forms of gas engines, and

the prime object is to provide a simple,

practical and etlicient 'form of timer brush which may be readily mounted in place upon the timer shaft of commonvmakes of automobile gas engines.

A secondary object is to provide a reversible form of brush.

In the drawing- Figure l is a plan view of a timer equipped with my improved form of brush, the cover of the timer being. removed so as to reveal the mounting of the brush;

FiO'ure 2 is a. pla-n view of the brush holder and brush removed from the timer case;

Figure 3 is an elevation of the brush holder and brush;

Figure 4 is an elevation of the brush holder and brush at an angle of forty-five degrees from the view shown in Figure 3;

Figure is a detail of the reversible brush element alone.

In carrying out the invention, I provide a brush holder l including a sleeve portion 2 for engaging the timer shaft l0, brush holding brackets 3 extended in spaced relation from the sleeve 2 at the same side thereof. 30 These brackets are provided with circular brush engaging bearings 4, the said apertures preferably having openings at out through the said brackets. The brush element includes aflat spring G ot the requisite 35 length` at the two ends of which are rigidly mounted small, cylindrical, twin brushes 7. These brushes 7 are of the exact size to nicely tit into the bearings 4. In order to most conveniently assemble the elements 6 and 7 in the holder l, the brushes 6 may be radially split as shown at 8, after which Serial N o. 222,472.

the brushes may be inserted through the bearings 4, the ends of the spring 6 inserted in the splits 8 and the parted sides of the brushes '7 then jammed together again upon the said ends of the spring, t-hus firmly locking the spring and brushes together. Or the joints may be made in any other conventional manner. The spring 6 is then drawn back laterally relative to the holder l as clearly shown in Figure 2, after which a pin 9 is passed through the brackets 3 outside of the spring 6, thereby locking the spring between the said pin and the sleeve 2. The assembly is then mounted in the timer shell ll with the sleeve 2 over the shaft l0 and the free brush 7 drawn backwa-rdly upon the race Way 12, in operative position.

This structure presents a simple and eiiicient form of timer brush assembly, one which is reversible end for endl as stated, and which operates to keep the race way clean and free of grease and oil as the brushes have a sliding contact therewith rather than a rolling contact. l

It is understood that minor changes may lbe made in the structure as here shown,

within the scope of the appended claim.

I claim:

A timer brush assembly comprising a holder, brush holding brackets extended from the holder in spaced relation, the said brackets having circular brush bearings formed therein, a brush element mounted on the said brackets, the same including a flat spring and small, cylindrical twin brushes rigidly mounted at the ends of the spring, one of the said brushes engaging the said bearings of the brush holding brackets.

In testimony whereof I affix my signature.

CHARLES DAY. 

